Thanks for watching!

On the computer or where at please help me

What is Marlin

@@trinitychiplove it is an software.

I'm not clear on where you would enter this configuration change?

Thanks for the sub!

I subject you seek alternate source of info on this subject. this source lacks a basic understanding of what is being done!

You should manually level your bed so that the nozzle will JUST touch the bed when the nozzle is at z=0, you NEVER want the nozzle to go lower than this ever.. Most leveling instructions will use a peice of paper which you can assume is 0.1mm thick, in that case you are setting your z=0 position to actually be 0.1mm ABOVE the build surface. If you now print a base layer at 0.1mm, the printer will move to z=0.1 because it starts at the first layer height NOT zero, and as you have the bed levelled to 0.1mm above the print surface it will actually be at 0.2mm above the build plate and will fail.. This is where a z offset should be used, based on a manual level at least, to lower the print by the thickness of the paper, or usually a little bit More than that. You do not need to mess about like this video, you just need to add the z offset plugin in cura and add a -0.12mm z offset and the first layer will start at JUST below the height of the first layer to get a squash onto the plate. However.. to get a decent first layer that in 0.1mm thick needs an extremely good surface, the creality glass bed for instance is one of the flattest and has a variance of up to 0.15mm, meaning no matter what you do you will never get a 0.1mm first layer to stick to it everywhere. In your slicer set your first layer to at least 0.2mm, i use 0.3mm myself, which will give a much better chance of a full layer sticking to the plate, you can also then adjust your z offset further to get the perfect layer because your nozzle will start at a height on 0.31mm above the plate with z offset of zero.. so a zoffset of -0.2 would still be 0.19mm above the plate.. ,

Please help

The auto bed leveling levels the bed using the probe (bltouch) but if the probe doesn't know where the nozzle is then it will print midair, so you need to set the z offset of the nozzle so the printer knows how much to compensate for the difference in height

My z offset is in the front left corner is yours in the middle?

@@Dawgbyte04 mine is set in the middle of the bed, I managed to get a "fairly decent" leveling. Some print jobs work fine, others are just pointless to even try, I just don't get it why and how they can send these machines out the door with severely compromised beds. I've tried it all and I can't get a "level bed" that will just print any given job no matter what.

Same here. Unfortunately tech questions don't seem to get answered by the host here. Update; If you've gone through a firmware update for auto bed leveling like I just did, you are familiar with Marlin and enabling/disabling firmware commands? So the reason the Z axis wouldn't go below zero is because there is a command line "MIN_SOFTWARE_ENDSTOP_Z" on line 1120 of Marlin 2 point whatever. That must be disabled with two slashes. Once disabled the process shown on the vid should work.

Had the same thing and the answer is very simple you might laugh. Instead of loweringer your Z. Turn those screws so the bed itself gets raised higher ;) That's how I did it and when eventually I could het a Z-offset

Same problem did you find out where it’s at ?

@@angrylee7212 no, I had to loosen the sensor on the Z axis and manually raise to where I needed it then tighten it